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參數(shù)資料
| 型號(hào)： | MAX6365PKA23-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | SOT23, Low-Power レP Supervisory Circuits with Battery Backup and Chip-Enable Gating |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | MINIATURE, SOT-23, 8 PIN |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 221K |
| 代理商： | MAX6365PKA23-T |
M
SOT23, Low-Power μP Supervisory Circuits
with Battery Backup and Chip-Enable Gating
_______________________________________________________________________________________
9
OUT goes high and stays high regardless of any sub-
sequent transitions on
CE
IN during the reset event.
When
CE
OUT is disconnected from
CE
IN,
CE
OUT is
actively pulled up to OUT.
The propagation delay through the chip-enable circuit-
ry depends on both the source impedance of the drive
to
CE
IN and the capacitive loading at
CE
OUT. The
chip-enable propagation delay is production tested
from the 50% point of
CE
IN to the 50% point of
CE
OUT, using a 50
driver and 50pF load capacitance.
Minimize the capacitive load at
CE
OUT to minimize
propagation delay, and use a low-output-impedance
driver.
Backup-Battery Switchover
In a brownout or power failure, it may be necessary to
preserve the contents of the RAM. With a backup bat-
tery installed at BATT, the MAX6365
–
MAX6368 auto-
matically switch the RAM to backup power when V
CC
falls. The MAX6367 has a BATT ON output that goes
high in battery-backup mode. These devices require
two conditions before switching to battery-backup
mode:
1) V
CC
must be below the reset threshold.
2) V
CC
must be below V
BATT
.
Table 1 lists the status of the inputs and outputs in bat-
tery-backup mode. The devices do not power up if the
only voltage source is on BATT. OUT only powers up
from V
CC
at startup.
Manual Reset Input (MAX6365 Only)
Many μP-based products require manual reset capabili-
ty, allowing the user or external logic circuitry to initiate a
reset. For the MAX6365, a logic low on
MR
asserts reset.
Reset remains asserted while
MR
is low and for a mini-
mum of 150ms (t
RP
) after it returns high.
MR
has an inter-
nal 20k
pullup resistor to V
CC
. This input can be driven
with TTL/CMOS logic levels or with open-drain/collector
outputs. Connect a normally open momentary switch
from
MR
to GND to create a manual reset function; exter-
nal debounce circuitry is not required. If
MR
is driven
from long cables or the device is used in a noisy environ-
ment, connect a 0.1μF capacitor from
MR
to GND to pro-
vide additional noise immunity.
Figure 1. Reset and Chip-Enable Timing
V
CC
OR BATT
RESET
THRESHOLD V
TH
RESET
CE IN
CE OUT
RESET
*
t
RD
t
RD
t
RP
t
RP
IF CE IN GOES HIGH BEFORE RESET ASSERTS,
CE OUT GOES HIGH WITHOUT DELAY AS
CE IN GOES HIGH.
RESET-TO-CE OUT DELAY (12
μ
s)
*
PIN
V
CC
OUT
STATUS
Disconnected from OUT
Connected to BATT
Connected to OUT. Current drawn from
the battery is less than 1
μ
A (at V
BATT
=
2.8V, excluding I
OUT
) when V
CC
= 0.
Asserted
High state
BATT
RESET/
RESET
BATT ON
MR
, RESET IN,
CE
IN, WDI
CE
OUT
Inputs ignored
Connected to OUT
Table 1. Input and Output Status in
Battery-Backup Mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6365PKA26 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH B - Cut Tape Product |
| MAX6365PKA26+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.63V 15UA 8PIN SOT-23 - Rail/Tube |
| MAX6365PKA26+T | 功能描述:監(jiān)控電路 uPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6365PKA26-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6365PKA29 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH B - Cut Tape Product |
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